Manchester United are shopping in the Bundesliga this season.
BILD says United ended a winless run of 11 away matches when they beat Partizan Belgrade 1-0 in their Europa League clash in Serbia on Thursday, to go top of Group L.
But they have a long way to go to compete at the top end of the Premier League again, and are reported to have targeted Mario Mandzukic, Thomas Muller and Denis Zakaria in January.
United are ready to pay €50m for Muller, but they face competition from Inter Milan for the Munich forward.
United are closing in on a deal for Borussia Moenchengladbach midfielder Zakaria.
The 22-year-old has 24 caps for Switzerland and is contracted to Moenchengladbach until 2022, but could be available for around £25m.
And United appear to be close to signing out-of-favour Juventus striker Mario Mandzukic, with some reports claiming a deal has already been agreed .